#define _CRT_SECURE_NO_WARNINGS
#pragma warning(disable:6031)

#include <stdio.h>

int main()
{
	int m = 0;
	scanf("%d", &m);
	int odd = m * m - m + 1;
	int i = 0;
	for (i = 0; i < m; i++)
	{
		printf("%d", odd);
		odd += 2;
		
		if (i < m - 1)
		{
			printf("+");
		}
	}

	return 0;
}